lustre/obdclass/class_obd.c

   1 /*
   2  * GPL HEADER START
   3  *
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 only,
   8  * as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License version 2 for more details (a copy is included
  14  * in the LICENSE file that accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * version 2 along with this program; If not, see
  18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  19  *
  20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  21  * CA 95054 USA or visit www.sun.com if you need additional information or
  22  * have any questions.
  23  *
  24  * GPL HEADER END
  25  */
  26 /*
  27  * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
  28  * Use is subject to license terms.
  29  *
  30  * Copyright (c) 2011, 2012, Intel Corporation.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_CLASS
  38 #ifndef __KERNEL__
  39 # include <liblustre.h>
  40 #else
  41 # include <asm/atomic.h>
  42 #endif
  43
  44 #include <obd_support.h>
  45 #include <obd_class.h>
  46 #include <lnet/lnetctl.h>
  47 #include <lustre_debug.h>
  48 #include <lprocfs_status.h>
  49 #include <lustre/lustre_build_version.h>
  50 #include <libcfs/list.h>
  51 #include <cl_object.h>
  52 #ifdef HAVE_SERVER_SUPPORT
  53 # include <dt_object.h>
  54 # include <md_object.h>
  55 #endif /* HAVE_SERVER_SUPPORT */
  56 #include <lustre_ioctl.h>
  57 #include "llog_internal.h"
  58
  59 #ifndef __KERNEL__
  60 /* liblustre workaround */
  61 atomic_t libcfs_kmemory = {0};
  62 #endif
  63
  64 struct obd_device *obd_devs[MAX_OBD_DEVICES];
  65 EXPORT_SYMBOL(obd_devs);
  66 struct list_head obd_types;
  67 DEFINE_RWLOCK(obd_dev_lock);
  68
  69 __u64 obd_max_pages = 0;
  70 __u64 obd_max_alloc = 0;
  71 #ifndef __KERNEL__
  72 __u64 obd_alloc;
  73 __u64 obd_pages;
  74 #endif
  75 static DEFINE_SPINLOCK(obd_updatemax_lock);
  76
  77 /* The following are visible and mutable through /proc/sys/lustre/. */
  78 unsigned int obd_alloc_fail_rate = 0;
  79 EXPORT_SYMBOL(obd_alloc_fail_rate);
  80 unsigned int obd_debug_peer_on_timeout;
  81 EXPORT_SYMBOL(obd_debug_peer_on_timeout);
  82 unsigned int obd_dump_on_timeout;
  83 EXPORT_SYMBOL(obd_dump_on_timeout);
  84 unsigned int obd_dump_on_eviction;
  85 EXPORT_SYMBOL(obd_dump_on_eviction);
  86 unsigned int obd_max_dirty_pages = 256;
  87 EXPORT_SYMBOL(obd_max_dirty_pages);
  88 atomic_t obd_dirty_pages;
  89 EXPORT_SYMBOL(obd_dirty_pages);
  90 unsigned int obd_timeout = OBD_TIMEOUT_DEFAULT;   /* seconds */
  91 EXPORT_SYMBOL(obd_timeout);
  92 unsigned int ldlm_timeout = LDLM_TIMEOUT_DEFAULT; /* seconds */
  93 EXPORT_SYMBOL(ldlm_timeout);
  94 unsigned int obd_timeout_set;
  95 EXPORT_SYMBOL(obd_timeout_set);
  96 unsigned int ldlm_timeout_set;
  97 EXPORT_SYMBOL(ldlm_timeout_set);
  98 /* Adaptive timeout defs here instead of ptlrpc module for /proc/sys/ access */
  99 unsigned int at_min = 0;
 100 EXPORT_SYMBOL(at_min);
 101 unsigned int at_max = 600;
 102 EXPORT_SYMBOL(at_max);
 103 unsigned int at_history = 600;
 104 EXPORT_SYMBOL(at_history);
 105 int at_early_margin = 5;
 106 EXPORT_SYMBOL(at_early_margin);
 107 int at_extra = 30;
 108 EXPORT_SYMBOL(at_extra);
 109
 110 atomic_t obd_dirty_transit_pages;
 111 EXPORT_SYMBOL(obd_dirty_transit_pages);
 112
 113 char obd_jobid_var[JOBSTATS_JOBID_VAR_MAX_LEN + 1] = JOBSTATS_DISABLE;
 114 EXPORT_SYMBOL(obd_jobid_var);
 115
 116 #ifdef LPROCFS
 117 struct lprocfs_stats *obd_memory = NULL;
 118 EXPORT_SYMBOL(obd_memory);
 119 #endif
 120
 121 /* Get jobid of current process by reading the environment variable
 122  * stored in between the "env_start" & "env_end" of task struct.
 123  *
 124  * TODO:
 125  * It's better to cache the jobid for later use if there is any
 126  * efficient way, the cl_env code probably could be reused for this
 127  * purpose.
 128  *
 129  * If some job scheduler doesn't store jobid in the "env_start/end",
 130  * then an upcall could be issued here to get the jobid by utilizing
 131  * the userspace tools/api. Then, the jobid must be cached.
 132  */
 133 int lustre_get_jobid(char *jobid)
 134 {
 135         int jobid_len = JOBSTATS_JOBID_SIZE;
 136         int rc = 0;
 137         ENTRY;
 138
 139         memset(jobid, 0, JOBSTATS_JOBID_SIZE);
 140         /* Jobstats isn't enabled */
 141         if (strcmp(obd_jobid_var, JOBSTATS_DISABLE) == 0)
 142                 RETURN(0);
 143
 144         /* Use process name + fsuid as jobid */
 145         if (strcmp(obd_jobid_var, JOBSTATS_PROCNAME_UID) == 0) {
 146                 snprintf(jobid, JOBSTATS_JOBID_SIZE, "%s.%u",
 147                          current_comm(),
 148                          from_kuid(&init_user_ns, current_fsuid()));
 149                 RETURN(0);
 150         }
 151
 152         rc = cfs_get_environ(obd_jobid_var, jobid, &jobid_len);
 153         if (rc) {
 154                 if (rc == -EOVERFLOW) {
 155                         /* For the PBS_JOBID and LOADL_STEP_ID keys (which are
 156                          * variable length strings instead of just numbers), it
 157                          * might make sense to keep the unique parts for JobID,
 158                          * instead of just returning an error.  That means a
 159                          * larger temp buffer for cfs_get_environ(), then
 160                          * truncating the string at some separator to fit into
 161                          * the specified jobid_len.  Fix later if needed. */
 162                         static bool printed;
 163                         if (unlikely(!printed)) {
 164                                 LCONSOLE_ERROR_MSG(0x16b, "%s value too large "
 165                                                    "for JobID buffer (%d)\n",
 166                                                    obd_jobid_var, jobid_len);
 167                                 printed = true;
 168                         }
 169                 } else {
 170                         CDEBUG((rc == -ENOENT || rc == -EINVAL ||
 171                                 rc == -EDEADLK) ? D_INFO : D_ERROR,
 172                                "Get jobid for (%s) failed: rc = %d\n",
 173                                obd_jobid_var, rc);
 174                 }
 175         }
 176         RETURN(rc);
 177 }
 178 EXPORT_SYMBOL(lustre_get_jobid);
 179
 180 int obd_alloc_fail(const void *ptr, const char *name, const char *type,
 181                    size_t size, const char *file, int line)
 182 {
 183         if (ptr == NULL ||
 184             (cfs_rand() & OBD_ALLOC_FAIL_MASK) < obd_alloc_fail_rate) {
 185                 CERROR("%s%salloc of %s ("LPU64" bytes) failed at %s:%d\n",
 186                        ptr ? "force " :"", type, name, (__u64)size, file,
 187                        line);
 188                 CERROR(LPU64" total bytes and "LPU64" total pages "
 189                        "("LPU64" bytes) allocated by Lustre, "
 190                        "%d total bytes by LNET\n",
 191                        obd_memory_sum(),
 192                        obd_pages_sum() << PAGE_CACHE_SHIFT,
 193                        obd_pages_sum(),
 194                         atomic_read(&libcfs_kmemory));
 195                 return 1;
 196         }
 197         return 0;
 198 }
 199 EXPORT_SYMBOL(obd_alloc_fail);
 200
 201 static int class_resolve_dev_name(__u32 len, const char *name)
 202 {
 203         int rc;
 204         int dev;
 205
 206         ENTRY;
 207         if (!len || !name) {
 208                 CERROR("No name passed,!\n");
 209                 GOTO(out, rc = -EINVAL);
 210         }
 211         if (name[len - 1] != 0) {
 212                 CERROR("Name not nul terminated!\n");
 213                 GOTO(out, rc = -EINVAL);
 214         }
 215
 216         CDEBUG(D_IOCTL, "device name %s\n", name);
 217         dev = class_name2dev(name);
 218         if (dev == -1) {
 219                 CDEBUG(D_IOCTL, "No device for name %s!\n", name);
 220                 GOTO(out, rc = -EINVAL);
 221         }
 222
 223         CDEBUG(D_IOCTL, "device name %s, dev %d\n", name, dev);
 224         rc = dev;
 225
 226 out:
 227         RETURN(rc);
 228 }
 229
 230 int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 231 {
 232         char *buf = NULL;
 233         struct obd_ioctl_data *data;
 234         struct libcfs_debug_ioctl_data *debug_data;
 235         struct obd_device *obd = NULL;
 236         int err = 0, len = 0;
 237         ENTRY;
 238
 239         /* only for debugging */
 240         if (cmd == LIBCFS_IOC_DEBUG_MASK) {
 241                 debug_data = (struct libcfs_debug_ioctl_data*)arg;
 242                 libcfs_subsystem_debug = debug_data->subs;
 243                 libcfs_debug = debug_data->debug;
 244                 return 0;
 245         }
 246
 247         CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
 248         if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
 249                 CERROR("OBD ioctl: data error\n");
 250                 RETURN(-EINVAL);
 251         }
 252         data = (struct obd_ioctl_data *)buf;
 253
 254         switch (cmd) {
 255         case OBD_IOC_PROCESS_CFG: {
 256                 struct lustre_cfg *lcfg;
 257
 258                 if (!data->ioc_plen1 || !data->ioc_pbuf1) {
 259                         CERROR("No config buffer passed!\n");
 260                         GOTO(out, err = -EINVAL);
 261                 }
 262                 OBD_ALLOC(lcfg, data->ioc_plen1);
 263                 if (lcfg == NULL)
 264                         GOTO(out, err = -ENOMEM);
 265                 err = copy_from_user(lcfg, data->ioc_pbuf1,
 266                                          data->ioc_plen1);
 267                 if (!err)
 268                         err = lustre_cfg_sanity_check(lcfg, data->ioc_plen1);
 269                 if (!err)
 270                         err = class_process_config(lcfg);
 271
 272                 OBD_FREE(lcfg, data->ioc_plen1);
 273                 GOTO(out, err);
 274         }
 275
 276         case OBD_GET_VERSION:
 277                 if (!data->ioc_inlbuf1) {
 278                         CERROR("No buffer passed in ioctl\n");
 279                         GOTO(out, err = -EINVAL);
 280                 }
 281
 282                 if (strlen(BUILD_VERSION) + 1 > data->ioc_inllen1) {
 283                         CERROR("ioctl buffer too small to hold version\n");
 284                         GOTO(out, err = -EINVAL);
 285                 }
 286
 287                 memcpy(data->ioc_bulk, BUILD_VERSION,
 288                        strlen(BUILD_VERSION) + 1);
 289
 290                 err = obd_ioctl_popdata((void *)arg, data, len);
 291                 if (err)
 292                         err = -EFAULT;
 293                 GOTO(out, err);
 294
 295         case OBD_IOC_NAME2DEV: {
 296                 /* Resolve a device name.  This does not change the
 297                  * currently selected device.
 298                  */
 299                 int dev;
 300
 301                 dev = class_resolve_dev_name(data->ioc_inllen1,
 302                                              data->ioc_inlbuf1);
 303                 data->ioc_dev = dev;
 304                 if (dev < 0)
 305                         GOTO(out, err = -EINVAL);
 306
 307                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 308                 if (err)
 309                         err = -EFAULT;
 310                 GOTO(out, err);
 311         }
 312
 313         case OBD_IOC_UUID2DEV: {
 314                 /* Resolve a device uuid.  This does not change the
 315                  * currently selected device.
 316                  */
 317                 int dev;
 318                 struct obd_uuid uuid;
 319
 320                 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
 321                         CERROR("No UUID passed!\n");
 322                         GOTO(out, err = -EINVAL);
 323                 }
 324                 if (data->ioc_inlbuf1[data->ioc_inllen1 - 1] != 0) {
 325                         CERROR("UUID not NUL terminated!\n");
 326                         GOTO(out, err = -EINVAL);
 327                 }
 328
 329                 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
 330                 obd_str2uuid(&uuid, data->ioc_inlbuf1);
 331                 dev = class_uuid2dev(&uuid);
 332                 data->ioc_dev = dev;
 333                 if (dev == -1) {
 334                         CDEBUG(D_IOCTL, "No device for UUID %s!\n",
 335                                data->ioc_inlbuf1);
 336                         GOTO(out, err = -EINVAL);
 337                 }
 338
 339                 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 340                        dev);
 341                 err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
 342                 if (err)
 343                         err = -EFAULT;
 344                 GOTO(out, err);
 345         }
 346
 347         case OBD_IOC_GETDEVICE: {
 348                 int     index = data->ioc_count;
 349                 char    *status, *str;
 350
 351                 if (!data->ioc_inlbuf1) {
 352                         CERROR("No buffer passed in ioctl\n");
 353                         GOTO(out, err = -EINVAL);
 354                 }
 355                 if (data->ioc_inllen1 < 128) {
 356                         CERROR("ioctl buffer too small to hold version\n");
 357                         GOTO(out, err = -EINVAL);
 358                 }
 359
 360                 obd = class_num2obd(index);
 361                 if (!obd)
 362                         GOTO(out, err = -ENOENT);
 363
 364                 if (obd->obd_stopping)
 365                         status = "ST";
 366                 else if (obd->obd_set_up)
 367                         status = "UP";
 368                 else if (obd->obd_attached)
 369                         status = "AT";
 370                 else
 371                         status = "--";
 372                 str = (char *)data->ioc_bulk;
 373                 snprintf(str, len - sizeof(*data), "%3d %s %s %s %s %d",
 374                          (int)index, status, obd->obd_type->typ_name,
 375                          obd->obd_name, obd->obd_uuid.uuid,
 376                          atomic_read(&obd->obd_refcount));
 377                 err = obd_ioctl_popdata((void *)arg, data, len);
 378
 379                 GOTO(out, err = 0);
 380         }
 381
 382         }
 383
 384         if (data->ioc_dev == OBD_DEV_BY_DEVNAME) {
 385                 if (data->ioc_inllen4 <= 0 || data->ioc_inlbuf4 == NULL)
 386                         GOTO(out, err = -EINVAL);
 387                 if (strnlen(data->ioc_inlbuf4, MAX_OBD_NAME) >= MAX_OBD_NAME)
 388                         GOTO(out, err = -EINVAL);
 389                 obd = class_name2obd(data->ioc_inlbuf4);
 390         } else if (data->ioc_dev < class_devno_max()) {
 391                 obd = class_num2obd(data->ioc_dev);
 392         } else {
 393                 CERROR("OBD ioctl: No device\n");
 394                 GOTO(out, err = -EINVAL);
 395         }
 396
 397         if (obd == NULL) {
 398                 CERROR("OBD ioctl : No Device %d\n", data->ioc_dev);
 399                 GOTO(out, err = -EINVAL);
 400         }
 401         LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
 402
 403         if (!obd->obd_set_up || obd->obd_stopping) {
 404                 CERROR("OBD ioctl: device not setup %d \n", data->ioc_dev);
 405                 GOTO(out, err = -EINVAL);
 406         }
 407
 408         switch(cmd) {
 409         case OBD_IOC_NO_TRANSNO: {
 410                 if (!obd->obd_attached) {
 411                         CERROR("Device %d not attached\n", obd->obd_minor);
 412                         GOTO(out, err = -ENODEV);
 413                 }
 414                 CDEBUG(D_HA, "%s: disabling committed-transno notification\n",
 415                        obd->obd_name);
 416                 obd->obd_no_transno = 1;
 417                 GOTO(out, err = 0);
 418         }
 419
 420         default: {
 421                 err = obd_iocontrol(cmd, obd->obd_self_export, len, data, NULL);
 422                 if (err)
 423                         GOTO(out, err);
 424
 425                 err = obd_ioctl_popdata((void *)arg, data, len);
 426                 if (err)
 427                         err = -EFAULT;
 428                 GOTO(out, err);
 429         }
 430         }
 431
 432  out:
 433         if (buf)
 434                 obd_ioctl_freedata(buf, len);
 435         RETURN(err);
 436 } /* class_handle_ioctl */
 437
 438 #ifdef __KERNEL__
 439 extern struct miscdevice obd_psdev;
 440 #else
 441 struct miscdevice obd_psdev;
 442 #endif
 443
 444 #define OBD_INIT_CHECK
 445 #ifdef OBD_INIT_CHECK
 446 static int obd_init_checks(void)
 447 {
 448         __u64 u64val, div64val;
 449         char buf[64];
 450         int len, ret = 0;
 451
 452         CDEBUG(D_INFO, "LPU64=%s, LPD64=%s, LPX64=%s\n", LPU64, LPD64, LPX64);
 453
 454         CDEBUG(D_INFO, "OBD_OBJECT_EOF = "LPX64"\n", (__u64)OBD_OBJECT_EOF);
 455
 456         u64val = OBD_OBJECT_EOF;
 457         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 458         if (u64val != OBD_OBJECT_EOF) {
 459                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 460                        u64val, (int)sizeof(u64val));
 461                 ret = -EINVAL;
 462         }
 463         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 464         if (len != 18) {
 465                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 466                 ret = -EINVAL;
 467         }
 468
 469         div64val = OBD_OBJECT_EOF;
 470         CDEBUG(D_INFO, "u64val OBD_OBJECT_EOF = "LPX64"\n", u64val);
 471         if (u64val != OBD_OBJECT_EOF) {
 472                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 473                        u64val, (int)sizeof(u64val));
 474                 ret = -EOVERFLOW;
 475         }
 476         if (u64val >> 8 != OBD_OBJECT_EOF >> 8) {
 477                 CERROR("__u64 "LPX64"(%d) != 0xffffffffffffffff\n",
 478                        u64val, (int)sizeof(u64val));
 479                 return -EOVERFLOW;
 480         }
 481         if (do_div(div64val, 256) != (u64val & 255)) {
 482                 CERROR("do_div("LPX64",256) != "LPU64"\n", u64val, u64val &255);
 483                 return -EOVERFLOW;
 484         }
 485         if (u64val >> 8 != div64val) {
 486                 CERROR("do_div("LPX64",256) "LPU64" != "LPU64"\n",
 487                        u64val, div64val, u64val >> 8);
 488                 return -EOVERFLOW;
 489         }
 490         len = snprintf(buf, sizeof(buf), LPX64, u64val);
 491         if (len != 18) {
 492                 CWARN("LPX64 wrong length! strlen(%s)=%d != 18\n", buf, len);
 493                 ret = -EINVAL;
 494         }
 495         len = snprintf(buf, sizeof(buf), LPU64, u64val);
 496         if (len != 20) {
 497                 CWARN("LPU64 wrong length! strlen(%s)=%d != 20\n", buf, len);
 498                 ret = -EINVAL;
 499         }
 500         len = snprintf(buf, sizeof(buf), LPD64, u64val);
 501         if (len != 2) {
 502                 CWARN("LPD64 wrong length! strlen(%s)=%d != 2\n", buf, len);
 503                 ret = -EINVAL;
 504         }
 505         if ((u64val & ~CFS_PAGE_MASK) >= PAGE_CACHE_SIZE) {
 506                 CWARN("mask failed: u64val "LPU64" >= "LPU64"\n", u64val,
 507                       (__u64)PAGE_CACHE_SIZE);
 508                 ret = -EINVAL;
 509         }
 510
 511         return ret;
 512 }
 513 #else
 514 #define obd_init_checks() do {} while(0)
 515 #endif
 516
 517 extern int class_procfs_init(void);
 518 extern int class_procfs_clean(void);
 519
 520 #ifdef __KERNEL__
 521 static int __init init_obdclass(void)
 522 #else
 523 int init_obdclass(void)
 524 #endif
 525 {
 526         int i, err;
 527 #ifdef __KERNEL__
 528         int lustre_register_fs(void);
 529
 530         for (i = CAPA_SITE_CLIENT; i < CAPA_SITE_MAX; i++)
 531                 INIT_LIST_HEAD(&capa_list[i]);
 532 #endif
 533
 534         LCONSOLE_INFO("Lustre: Build Version: "BUILD_VERSION"\n");
 535
 536         spin_lock_init(&obd_types_lock);
 537         obd_zombie_impexp_init();
 538 #ifdef LPROCFS
 539         obd_memory = lprocfs_alloc_stats(OBD_STATS_NUM,
 540                                          LPROCFS_STATS_FLAG_NONE |
 541                                          LPROCFS_STATS_FLAG_IRQ_SAFE);
 542         if (obd_memory == NULL) {
 543                 CERROR("kmalloc of 'obd_memory' failed\n");
 544                 RETURN(-ENOMEM);
 545         }
 546
 547         lprocfs_counter_init(obd_memory, OBD_MEMORY_STAT,
 548                              LPROCFS_CNTR_AVGMINMAX,
 549                              "memused", "bytes");
 550         lprocfs_counter_init(obd_memory, OBD_MEMORY_PAGES_STAT,
 551                              LPROCFS_CNTR_AVGMINMAX,
 552                              "pagesused", "pages");
 553 #endif
 554         err = obd_init_checks();
 555         if (err == -EOVERFLOW)
 556                 return err;
 557
 558         class_init_uuidlist();
 559         err = class_handle_init();
 560         if (err)
 561                 return err;
 562
 563         INIT_LIST_HEAD(&obd_types);
 564
 565         err = misc_register(&obd_psdev);
 566         if (err) {
 567                 CERROR("cannot register %d err %d\n", OBD_DEV_MINOR, err);
 568                 return err;
 569         }
 570
 571         /* This struct is already zeroed for us (static global) */
 572         for (i = 0; i < class_devno_max(); i++)
 573                 obd_devs[i] = NULL;
 574
 575         /* Default the dirty page cache cap to 1/2 of system memory.
 576          * For clients with less memory, a larger fraction is needed
 577          * for other purposes (mostly for BGL). */
 578         if (totalram_pages <= 512 << (20 - PAGE_CACHE_SHIFT))
 579                 obd_max_dirty_pages = totalram_pages / 4;
 580         else
 581                 obd_max_dirty_pages = totalram_pages / 2;
 582
 583         err = obd_init_caches();
 584         if (err)
 585                 return err;
 586 #ifdef __KERNEL__
 587         err = class_procfs_init();
 588         if (err)
 589                 return err;
 590 #endif
 591
 592         err = lu_global_init();
 593         if (err)
 594                 return err;
 595
 596         err = lu_capainfo_init();
 597         if (err)
 598                 return err;
 599
 600         err = cl_global_init();
 601         if (err != 0)
 602                 return err;
 603
 604 #if defined(__KERNEL__) && defined(HAVE_SERVER_SUPPORT)
 605         err = dt_global_init();
 606         if (err != 0)
 607                 return err;
 608
 609         err = lu_ucred_global_init();
 610         if (err != 0)
 611                 return err;
 612 #endif
 613
 614         err = llog_info_init();
 615         if (err)
 616                 return err;
 617
 618 #ifdef __KERNEL__
 619         err = lustre_register_fs();
 620 #endif
 621
 622         return err;
 623 }
 624
 625 void obd_update_maxusage(void)
 626 {
 627         __u64 max1, max2;
 628
 629         max1 = obd_pages_sum();
 630         max2 = obd_memory_sum();
 631
 632         spin_lock(&obd_updatemax_lock);
 633         if (max1 > obd_max_pages)
 634                 obd_max_pages = max1;
 635         if (max2 > obd_max_alloc)
 636                 obd_max_alloc = max2;
 637         spin_unlock(&obd_updatemax_lock);
 638 }
 639 EXPORT_SYMBOL(obd_update_maxusage);
 640
 641 #ifdef LPROCFS
 642 __u64 obd_memory_max(void)
 643 {
 644         __u64 ret;
 645
 646         spin_lock(&obd_updatemax_lock);
 647         ret = obd_max_alloc;
 648         spin_unlock(&obd_updatemax_lock);
 649
 650         return ret;
 651 }
 652 EXPORT_SYMBOL(obd_memory_max);
 653
 654 __u64 obd_pages_max(void)
 655 {
 656         __u64 ret;
 657
 658         spin_lock(&obd_updatemax_lock);
 659         ret = obd_max_pages;
 660         spin_unlock(&obd_updatemax_lock);
 661
 662         return ret;
 663 }
 664 EXPORT_SYMBOL(obd_pages_max);
 665 #endif
 666
 667 /* liblustre doesn't call cleanup_obdclass, apparently.  we carry on in this
 668  * ifdef to the end of the file to cover module and versioning goo.*/
 669 #ifdef __KERNEL__
 670 static void cleanup_obdclass(void)
 671 {
 672         int lustre_unregister_fs(void);
 673         __u64 memory_leaked, pages_leaked;
 674         __u64 memory_max, pages_max;
 675         ENTRY;
 676
 677         lustre_unregister_fs();
 678
 679         misc_deregister(&obd_psdev);
 680         llog_info_fini();
 681 #ifdef HAVE_SERVER_SUPPORT
 682         lu_ucred_global_fini();
 683         dt_global_fini();
 684 #endif
 685         cl_global_fini();
 686         lu_capainfo_fini();
 687         lu_global_fini();
 688
 689         obd_cleanup_caches();
 690         obd_sysctl_clean();
 691
 692         class_procfs_clean();
 693
 694         class_handle_cleanup();
 695         class_exit_uuidlist();
 696         obd_zombie_impexp_stop();
 697
 698         memory_leaked = obd_memory_sum();
 699         pages_leaked = obd_pages_sum();
 700
 701         memory_max = obd_memory_max();
 702         pages_max = obd_pages_max();
 703
 704         lprocfs_free_stats(&obd_memory);
 705         CDEBUG((memory_leaked) ? D_ERROR : D_INFO,
 706                "obd_memory max: "LPU64", leaked: "LPU64"\n",
 707                memory_max, memory_leaked);
 708         CDEBUG((pages_leaked) ? D_ERROR : D_INFO,
 709                "obd_memory_pages max: "LPU64", leaked: "LPU64"\n",
 710                pages_max, pages_leaked);
 711
 712         EXIT;
 713 }
 714
 715 MODULE_AUTHOR("Sun Microsystems, Inc. <http://www.lustre.org/>");
 716 MODULE_DESCRIPTION("Lustre Class Driver Build Version: " BUILD_VERSION);
 717 MODULE_LICENSE("GPL");
 718
 719 cfs_module(obdclass, LUSTRE_VERSION_STRING, init_obdclass, cleanup_obdclass);
 720 #endif